weynton jones



(No Model.)

F. J. 85 G. W. JONES.

MEANS FOR CLOSING LEAKS' IN PNEUMATIC TIRES.

No. 587,211. Patented July 27, 1897.

m: Nona PEER; co. moYo-Lrruq. WASHINGTON. a, c.

UNITED STATES PATENT 7 OFFICE.

FREDERICK JOSIAH JONES AND GWENDOLEN WEYNTON JONES, OF KINGS HEATH,ENGLAND, ASSIGNORS TO THE TYRE PUNOTURE CURING SYNDI- GATE, LIMITED, OFLONDON, ENGLAND.

MEANS FOR CLOSING LEAKS IN PNEUMATIC TIRES.

SPECIFICATION forming part of Letters Patent No. 587,211, dated July 27,1897.

' Application filed March 1,1897. Serial No. 625,659. (No model.)

To all whom it may concern:

Be it known that we, FREDERICK JOSIAH JoNEs, civil engineer, andGWENDOLEN WVEYNTON JONES, spinster, residing at Brentwood, Stanley Road,Kings Heath, in the county of Worcester, England, subjects of the Queenof Great Britain, have invented certain new and useful Im provements inOlos-' ing Leaks in Pneumatic Tires and other In- 10 flatable RubberArticles, of which the following is a specification.

The accompanying drawing shows a pneumatic tire partly broken away toillustrate how the sealing liquid which we employ is applied to theinterior thereof.

The object of this invention is to provide means for closing up slightleakages in rubber articles, such as pneumatic tires, whether arisingfrom the porosity of the rubber or '20 from punctures. Weemployachemical compound which when distributed over the interior ofpneumatic tires of cycles and vehicles or other inflated articles ofrubber closes up tightly leakages of all kinds.

In carrying out our invention We employ dissolved pyroxylinrenderednon-hardening by the additionof glycerin, treacle,-or othersuitable non-drying medium to act as a vehicle to hold the dissolvedpyroxylin in suspension. Care should be taken that the resulting liquidis not harmful to india-rubber.

When the compound is distributed over the interior of the inflatedarticle, a non-drying elastic skin is formed, which closes the 3 5 poresin therubber or forms a plug in case of a'puncture.

As an example of the material employed, a suitable compound consistsapproximately of ten grains of pyroxylin dissolved in one 40 andone-half ounces each of amyl acetate and amyllic alcohol and mixedintimately with twelve ounces of glycerin. Although we find the aboveproportions suitable in most cases we do not confine ourselves to them,but may vary the quantities to suit the purposes for which they arerequired and the quality of the ingredients used. Thus the differentsolvents of the pyroxylin which may be used would require differentproportions of the 5G non-drying media.

In carrying outthis invention a tire, for

pound is introduced into it to cover the entire surface and to leave asmall quantity over in it, as indicated at 00 in the accompanyingdrawing. When the tire is punctured, the compound fills up the hole andbecomes semisolid therein by the evaporation of the solvent. The air inthe article does not innpair the liquid employed, as this air soonbecomes saturated with the solvent vapor, and after that the solventdoes not evaporate until a puncture occurs. The pyroxylin employed isthe active agent in our compound. The solvent is extremely volatile, andit vapthe pyroxylin to quickly harden. The glycerin, treacle, or thelike prevents the too rapid evaporation of the solvent, and as it -movesaround with the tire keeps the skin formed on the interior of the tirefrom hardeningthat is to say, the glycerin keeps the skin soft, so thatwhen a puncture occurs the compound may fill the puncture to seal it.

The stopper or seal formed by the pyroxylin compound is not alfected bywater. It therefore differs from a seal or stopper made of glue, flourpaste, and the like, which is readily soluble in Water. Even when athorn or nail pierces the tube the sealing liquid will harden around thethorn or nail and prevent the escape of air, the thorn or nail merelyacting as a part of the plug or seal.

' We claim as our invention 1. An inflated rubber article having withinit a sealing agent of dissolved pyroxylin rendered, non-hardening by theaddition of a non-drying medium."\

2. An inflated rubber article having within it a sealing agent ofpyroxylin dissolved in amyl acetate and amyllic alcohol, with theaddition of glycerin, treacle, or the like.

FREDERICK JOSIAH JONES. GWENDOLEN WEYNTON JONES.

Witnesses:

G. PEARSALL LACKER, ALBERT NEWEY.

example, is taken, and enough of the com-' orizes as soon as exposed tothe air, leaving-

